Hi Antonio,
On Tue, 2005-11-22 at 09:23 +0100, antonio_lioy wrote:
>
> thanks, but where should I put the camera to see all the content of
> the scene on a single flat screen? Should I simply put the camera a
> little back or should I use some esotherical projection to see all the
> scene like an external viewer would?
that depends on what you want to see and your scene. You can't really
given an external viewer the same view somebody has in the Cave. You
could just show the same image the person sees in hte Cave by showing
both (or however many you have) walls, but it will look very distorted.
> I just set an external client window as the the MultiDisplayWindow client
> window
OK.
On Tue, 2005-11-22 at 09:44 +0100, antonio_lioy wrote:
>
> What do you exactly mean with discontinuity? Anyway, I've got a two
> Wall cave (with a central wall and a left one). The coords are :
> Left Wall (-100,95,100)(-100,-95,-100)(-100,95,-100)(-100,95,100)
> Front Wall(-100,-95,-100)(100,-95,-100)(100,95,-100)(-100,95-100)
> units are cm, our tracking system reference frame is in the center of
> our cave.
Hm, are those really the coordinates you use? The order you give for the
left wall is upper left, lower right, upper right, lower left. The
ProjectionDecorator needs lower left, lower right, upper right, upper
left.
> What do you mean? How should I correct the tracking position?
The tracker doesn't give you the eye position, you need to offset the
position you get from the tracker so that the position used in OpenSG is
the position between the eyes (cyclops eye). One way to estimate this
offset is to use the head tracker at a central position, record the
tracking data, turn off updates of the head tracker Node in OpenSG, move
the head so that the image looks right, record the tracker data, and
subtract the two tracker sets to get the offset. It's not perfectly
accurate, but it should be good enough for getting started.
Hope it helps
Dirk
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